Abstract: An improvement in a contour copying machine having means for supporting at least one pattern and at least one workpiece rotatably about parallel respective pattern and workpiece longitudinal axes, means for synchronously rotating the pattern and the workpiece about the respective axes, at least one copying roller engageable with the pattern, and at least one tool engageable with the workpiece, the copying roller and the tool being rigidly interconnected and synchronously movable about the respective longitudinal axes, and means for urging the copying roller and the tool against the pattern and the workpiece, respectively, for machining the workpiece and accurately reproducing therein the contours of the pattern, the improvement comprising: a rigid support frame for supporting and rigidly interconnecting the copying roller and the tool in proximate relation to one another, traction means connected to the support frame at points thereon situated symmetrically with respect to the copying roller, and biasing mean

Abstract: An improvement is disclosed in apparatus for copy-machining a workpiece from a master model, the apparatus being moved along the workpiece by a feed mechanism in response to the scanning of the master model. The improvement comprises a first tool and a second tool mounted on the feed mechanism, a pivot arm for supporting the second tool for movement relative to the first tool in the direction of movement along said workpiece, and means for locking said pivot arm and second tool at a desired position, said first and second tools engaging the workpiece in staggered relationship to one another, with reference to the direction of movement along said workpiece, wherein the relative positions of said first and second tools are adjustable by movement of the second tool in response to movement of the pivot arm and locking the pivot arm and second tool at the desired position. Apparatus is also disclosed wherein the pivot arm is situated substantially orthogonal to the direction of movement along said workpiece.

Abstract: This invention relates to apparatus for copy-grinding workpieces consisting particularly of wood or a similarly grindable material, e.g. aluminum, and having an uneven surface, such apparatus comprising a rotatable clamping device for receiving a workpiece therein and at least one driven grinding tool positively controlled by a scanning roller scanning a master model and adapted to be advanced along the workpiece in the direction of the axis of rotation by an advancing mechanism.

Abstract: This invention relates to a duplicating grinding machine for grinding workpieces of irregular three-dimensional shape, wherein a model and at least one workpiece are mounted side by side in spaced parallel relation to one another between clamping devices so as to be synchronously rotatable about their longitudinal axes, said model and each of said workpieces having associated therewith two carrier arms each, one carrier arm associated with said model and at least one carrier arm associated with said workpiece being interconnected to form a unit and adapted to be brought into pressing engagement with said model and said associated workpiece, respectively, with one carrier arm of a first interconnected unit carrying a scanning roller for scanning said model and adapted to be translated along the length of said model and each other carrier arm of said first unit carrying a motor-driven belt grinding assembly having an endless grinding belt looped around a return roller and a contact roller, and with one carrier

Abstract: Disclosed is a machine for grinding edge areas of slab formed parts including a pair of grinding units pivotally supported on opposite sides of a part clamped for rotation. Pressure elements carried by the frame press the grinding belts against the formed part. Means are provided for adjusting the direction of approach of each grinding belt in accordance with the rotational position of the part so that the angles formed by the belt and the formed part as the belt approaches and leaves the formed part are generally equal to one another.

Abstract: At least one workpiece is rotated synchronously with a model in a contour-copying lathe. A feeler engages the model and is linked to a tool similarly engageable with the workpiece so that as the feeler rides up and down and travels along the model the synchronously displaced tool similarly shapes the workpiece. Those preshaped regions on the model corresponding to the surfaces on the workpiece which are not to be shaped are provided with extensions so that the tool is lifted from the workpiece at these preshaped surfaces.

Abstract: A contour-copying machine in which a plurality or workpieces are spanned between headstocks and tailstocks and rotatable synchronously about respective parallel axes parallel to the rotation axis of a pattern with a feeler roller engaging the pattern and a plurality of tools linked to the feeler roller cutting the contour of the pattern into the workpieces is programmed so as separately to cut longitudinally extending planar surfaces in the workpieces and to form rounded contours along these workpieces. To this end the machine is indexed through a plurality of angular positions each corresponding to one of the planar surfaces and the pattern and workpieces are restrained from rotating as these longitudinally extending planar surfaces cut into them. Once all of the longitudinally extending planar surfaces are formed, the workpiece is rotated continuously and the tools cut the remaining rounded surfaces in these workpieces.

Abstract: An apparatus for shaping a wooden workpiece according to a template configuration has a carriage displaceable on a track parallel to a guide edge of a template clamped on a table to one side of the track. A workpiece is clamped to a table to the opposite side of the track. A slide is displaceable on the carriage transverse to the track and carries on one end a roller engaging the guide edge of the template and on its other end a driven tool for cutting the shape of the template into the workpiece. The slide is urged toward the workpiece so that virtually no lateral force is exerted against the workpiece, the guide edge acting as a stop positively determining the transverse position of the slide. Another template can support a second feeler roller which is connected via a chain or the like to the tool to raise and lower this tool according to the guide edge on the second template for two-sided cutting of the workpiece.

Abstract: A succession of wood workpieces is displaced by a conveyor past a plurality of finishing stations with the grain of the workpieces extending perpendicular to the transport direction. An abrasive surface of a finishing tool is displaced over the workpiece parallel to the grain direction at a peripheral speed equal to about 150 times the advance speed of the workpieces. These workpieces are wood chair seats formed with a surface depression and the abrasive surface is a sanding belt spanned over a vertically displaceable soft drum or cushion. The soft support for the sanding belt is displaced vertically by a cam arrangement to conform the path of travel of the sanding surface to the workpiece. The sanding region of one station is staggered transversely to the transport direction with respect to the other stations.